I'm assuming you have a new installation of Feng Office that only contains that one test workspace that is showing?
As you add workspaces, resources (people) and tasks to Feng Office, you will see the boxes start to populate with that data, and you can select one or more workspaces, and/or one or more resources, and then click "Submit" to generate a gantt chart of all the tasks associated with what you picked.
If you have more workspaces and resources than are showing on the screen, then there is a problem with data or security in MySQL and you can tell by viewing the source of the iframe below the selection screen - instructions are probably in the third post of this thread, under "troubleshooting".